e4 vs Greystone
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
e4
Access in-depth biblical and theological courses taught by distinguished scholars. Explore topics from apologetics to faith and science through lectures and Q&A sessions. Offers over 120 hours of content, with some courses available for free and others at a low cost.
- Biblical and theological courses
- Taught by distinguished scholars
- Lectures and Q&A sessions
- Transcribed content
- Synchronized video and text
- Over 120 hours of content
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We filmed distinguished biblical scholars & theologians teaching & interacting with deeply engaged participants. Themes considered ranged from Apologetics to Martin Luther, from Spiritual Formation to Medical Ethics, from The Divine Conspiracy to Faith & Science. The courses varied from 5-day intensives to a 2-hour seminar. There were lectures and Q&A sessions. We edited the footage, transcribed the lectures & interactions, and integrated all of it in synchronized form to present to you about 120 thought-provoking hours of genuine insight. Faith seeking understanding, discovering wisdom. That’s our hope, in creating e4. Three courses are free, and the rest cost US$5 or less. That's a pretty incredible deal for the quality, depth and scope of these courses. e4 contains the following courses: 1. The Provocative Church • Graham Tomlin (14 hours). What kind of church might offer disenchanted postmoderns genuine trust, hope, & love? Graham Tomlin explores this question in a deeply moving course that is inspired by history and grounded in the scriptures. Graham is the Principal of St Paul’s Theological Centre in London and Dean of St Mellitus College. 2. Christianity: the Future • Alister McGrath (2 hours). Alister McGrath reflects on the future of Christianity. Alister is the Chair of Theology, Ministry & Education at King's College, London. 3. Apologetics • Bill Edgar (23 hours). Bill Edgar offers a historical look at Christian apologetics and culture. Bill performs jazz on the piano and offers fascinating analyses of film, art, & music. Bill is Professor of Apologetics and Coordinator of the Apologetics Department at Westminster Theological Seminary. 4. The Divine Conspiracy • Dallas Willard (19 hours). What is the good life? What does it mean to be blessed? How do we live the authentic Christian life? Dallas Willard explores these fundamental questions and offers answers rich in wisdom and biblical strength, with a focus on the Sermon on the Mount and its application to modern discipleship. Dallas is Professor in the School of Philosophy at the University of Southern California in Los Angeles. 5. Faith & Science • Alister McGrath (17 hours). Are science & religion fundamentally incompatible? Alister McGrath, a gifted theologian and experienced scientist, looks at the major historical developments in science, philosophy, & religion, dispelling myths and offering a thoughtful case for the complementary roles of religion & science. 6. Medical Ethics • David Cook (2 hours). David Cook presents a Biblical perspective on medical ethics. David is the Director of the Whitefield Institute in Oxford & Holmes Professor of Faith & Learning at Wheaton College. 7. Media Culture • Gordon Pennington (5 hours). Media consultant Gordon Pennington draws upon his marketing experience in a provocative course intended to help us understand and win the battle for our minds. Former director of marketing for Tommy Hilfiger, Gordon is an international consultant. 8. re:Formation • Graham Tomlin (24 hours). Graham Tomlin offers a creative program for church-based spiritual development, drawing from biblical discipleship narratives and the stories and traditions of the Reformation, with emphasis on Martin Luther's life & struggles. 9. Martin Luther • Graham Tomlin (9 hours). Graham Tomlin surveys Martin Luther, with a view to mining Luther’s wisdom for contemporary spiritual formation. [Note: this course is extracted from re:Formation, and is therefore completely contained in re:Formation] 10. Biblical Stewardship • Bruce Waltke, Randy Alcorn, Andy Stanley, Rick Warren & others (13 hours). Stewardship and giving are crucial areas of spiritual development. This course offers perspective from a diverse group of scholars, financial experts, & pastors. ... Notes: 1. "We"= Faith, Joe, Jonathan, Kennedy, Chad, TJ, Lauren, Sherry, Luder & Pavi. 2. Please don’t buy “Martin Luther” if you already own “re:Formation”.
Greystone
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The app of Greystone Theological Institute, providing a rapidly growing library of thousands of hours of video and audio resources in Reformed theology, biblical studies, ethics, ministry, and spiritual formation, plus texts, live-streamed seminars, workshops, and other events. Enjoy a limited offering of free content, or subscribe for access to all content. Privacy Policy: https://www.greystoneinstitute.org/privacy-policy Terms of Service: https://treefortsystems.com/terms-of-service
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Verdict
The clearest difference is iOS requirement: e4 at 7.0 against Greystone's 15.1. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. e4 sells 10 one-off in-app purchases and Greystone sells 3 in-app purchases, starting at $17.99 per month. Whichever you choose, the download price is not the number that matters.
e4 ships an update every 2 months, Greystone every 3 months. The most recent releases landed on October 6, 2026 and October 11, 2026 respectively.
| Parameter | e4 | Greystone |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (5 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 7.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 59 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | e4 | Greystone Theological Institute |
In-app purchases
e4
- Christianity: the Future$0.99
- Medical Ethics$0.99
- Media Culture$2.99
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- Martin Luther$3.99
- Biblical Stewardship$4.99
- Apologetics$4.99
- Faith & Science$4.99
- re:Formation$4.99
- The Divine Conspiracy$4.99
- The Provocative Church$4.99
Greystone
- Greystone Monthly Membership$17.991 Month
- Greystone Membership Plus$29.991 Month
- Greystone Annual Membership$197.991 Year









